HansonMB writes: These frigid winter weekends we’ve been having here in New York City present plenty of opportunities to stay indoors and catch up on some quality videogame time. But some students at NYU Tisch would much rather spend their snow days making the games themselves. And they aren’t alone — The crowds of game developers that hunkered down in front of laptops at NYU’s Game Center in late January were taking part in the Global Game Jam, an annual game-making marathon that occurs simultaneously around the world.